While my Suburban is out of commission over some fuel injector issues I'm also going to replace the flexplate. Got quoted over 500 bills for a shop to do this and even though I've never done it, it doesn't seem too difficult and I'd like to save those Benjamins. The plan is to support the transmission with a tyranny jack, unbolt the drive shafts, use some all thread or longer bolts on the bottom two bolts, and slide the transmission back. Is it easier to just go in with some long extensions over the top of the transmission or with the upper intake out of the way is there enough room to get to the top bolts between the engine and firewall?